OpenCritic - OpenCritic is basically a community-based website that aggregates the news, reviews and views on a game on a single platform.
Metacritic - Metacritic aggregates music, game, tv, and movie reviews from the leading critics. Only Metacritic.com uses METASCORES, which let you know at a glance how each item was reviewed.
YoloMouse - An open source tool for changing your game cursor.
IGDB - An open video game database
Shou.TV - Stream your iOS/Android gaming sessions like Twitch.
whatoplay - Game discovery made easier.